Ichirou was laid off in a corporate restructuring and his unemployment insurance ran out. With his money lasting only 2 more months, he resigned himself to death. He thought about the only person who had smiled at him – a girl on a scooter that he had always seen when commuting to work. Deciding to see her panties before he dies, he sprawled on the road waiting for her. However, he was run over by her and ended up losing his memories. Feeling that it was her fault, the girl Risako brought him into her house and let him live there along with her sisters Misaki and Fuuka in exchange for doing house chores.